They have been skating __________.
#40389
A
for three hours
B
since three hours ago
C
three hours ago
D
since three hours
推荐题目
They _______ in Nanjing since they came to China two years ago.
#36991
A
lived
B
have lived
C
live
D
are living
Mr. Green _______ his lessons when I went into his office.
#36585
A
prepares
B
prepared
C
is preparing
D
was preparing
---Did you visit your uncle last Sunday? ---No, I ______ to a wonderful movie with my friends.
#41609
A
go
B
didn’t go
C
went
D
did went